Contacta V Series Operation manual

1
V22
Installation &
User Guide
May 2021
Hearing Loop Driver

2
Contents
Product Overview
Components
Connections
Suitable Cable Lengths
Driver Area Coverage
Controls
Hearing Loop Setup
Troubleshooting
Warning / Error Messages
Technical Specications
3
4
5-6
7-8
9
10-18
19-24
25
26
28
Contacta has a policy of continuous product development, therefore small specification
changes may not be reflected in this manual. Images, labels, packaging, accessories and
product colors are subject to change without notice.

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Product Overview
Our highly eicient V22 hearing loop driver is built around high-end
technology designed for the agship V Series PRO hearing loop driver
range. It is suitable for driving the most demanding perimeter loop
systems in medium to large venues.
With a Class-D amplier output stage, the V22 delivers a high enough
current to drive even the toughest loop loads.
The audio subsystem is built around an advanced DSP core. Combined
with a microprocessor control that ensures peak performance, the
driver uses cutting edge technology to deliver peak performance.
Note: For large area hearing loop installation instructions, consult the
Large Area Hearing Loop Installation Guide.

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*Plug type varies by country.
Cable & Equipment: A length of loop cable determined by the loop
design is also required. Hearing loop drivers also require ancillary
equipment for audio feeds, such as a microphone or sound system.
Components
1. Rubber Feet x 4
2. 2-way 3.5mm Euro-Block Connector x 2
3. 3-way 3.5mm Euro-Block Connectors x3
4. 4-way Terminal Block
5. Hearing Loop Stickers
6. V22 Hearing Loop Driver
7. User Guide
8. IEC Power Lead*
9. Rack Mounting Ears
10. Compliance Certicate
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8
1
2
7
47
10
3
8
9
445

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1. Power Supply Input
*
2.
Factory Use (no user input)
3.
Line Input - 3.5mm Euro-block balanced line input
4.
100V Line Input - 3.5mm Euro-block transformer isolated &
balanced
5.
MP3 (Line Input)- 3.5mm Euro-block transformer isolated &
balanced
6.
Line/Microphone - Switchable phantom power (12V) XLR
7.
Line Output – 3.5mm Euro-block
8.
Loop Output - 5.08mm 4-way terminal block
Connections
*Power Sources - This product should be operated only from the type
of power source indicated on the marking label. If you are not sure of
the type of power supply to your home, consult your product dealer or
local power company. The primary method of isolating the amplier
from the mains supply is to disconnect the mains plug. Ensure that the
mains plug remains accessible at all times. Unplug the AC power cord
from the AC outlet if the unit will not be used for several months or
more.

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Connection Examples
XLR to Euroblock (balanced)
Unbalanced to Euroblock
Isolated and Balanced

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Suitable Cable Lengths
The tables in this section show the approximate maximum cable
lengths for diering maximum required currents to achieve a
400mA/m eld strength.
Loop impedance (at 1.6kHz) should be less than voltage capability of
the driver (22V) divided by the required current.
V22 Single-Turn (Metric)
Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A
Impedance 22.6Ω11.3Ω7.53Ω5.65Ω4.52Ω3.77Ω3.23Ω2.83Ω2.51Ω2.26Ω2.05Ω1.88Ω
Cable Type Cable Length
Max.
Cable
Length
Round
Cable
(AWG)
1.5mm 970.99m 485.50m 323.66m 242.75m 194.20m 161.83m 138.71m 121.37m 107.89m 97.10m 88.27m 80.92m
2.5mm 1091.74m 545.87m 363.91m 272.94m 218.35m 181.96m 155.96m 136.47m 121.30m 109.17m 99.25m 90.98m
Flat Cable
(Width)
10mm 614.41m 307.21m 204.80m 153.60m 122.88m 102.40m 87.77m 76.80m 68.27m 61.44m 55.86m 51.20m
12.5mm 1161.97m 580.99m 387.32m 290.49m 232.39m 193.66m 166.00m 145.25m 129.11m 116.20m 105.63m 96.83m
25mm 1538.27m 769.13m 512.76m 384.57m 307.65m 256.38m 219.75m 192.28m 170.92m 153.83m 139.84m 128.19m
V22 Single-Turn (Imperial)
Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A
Impedance 22.6Ω11.3Ω7.53Ω5.65Ω4.52Ω3.77Ω3.23Ω2.83Ω2.51Ω2.26Ω2.05Ω1.88Ω
Cable Type Cable Length
Max.
Cable
Length
Round
Cable
(AWG)
18AWG 2552.86ft 1276.43ft 850.95ft 638.21ft 510.57ft 425.48ft 364.69ft 319.11ft 283.65ft 255.29ft 232.08ft 212.74ft
14AWG 3408.47ft 1704.23ft 1136.16ft 852.12ft 681.69ft 568.08ft 486.92ft 426.06ft 378.72ft 340.85ft 309.86ft 284.04ft
Flat
Cable
(Width)
18AWG
(equiv.)
2871.76ft 1435.88ft 957.25ft 717.94ft 574.35ft 478.63ft 410.25ft 358.97ft 319.08ft 287.18ft 261.07ft 239.31ft
14AWG
(equiv.)
4538.17ft 2269.08ft 1512.72ft 1134.54ft 907.63ft 756.36ft 648.31ft 567.27ft 504.24ft 453.82ft 412.56ft 378.18ft

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V22 Double-Turn Hearing Loop (Metric)
Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A
Impedance 22.6Ω11.3Ω7.53Ω5.65Ω4.52Ω3.77Ω3.23Ω2.83Ω2.51Ω2.26Ω2.05Ω1.88Ω
Cable Type Cable Length
Max.
Cable
Length
Round
Cable
(AWG)
1.5mm 650.61m 325.31m 216.87m 162.65m 130.12m 108.44m 92.94m 81.33m 72.29m 65.06m 59.15m 54.22m
2.5mm 683.46m 341.73m 227.82m 170.87m 136.69m 113.91m 97.64m 85.43m 75.94m 68.35m 62.13m 56.96m
Flat Cable
(Width)
10mm 537.58m 268.79m 179.19m 134.39m 107.52m 89.60m 76.80m 67.20m 59.73m 53.76m 48.87m 44.80m
12.5mm 831.19m 415.60m 277.06m 207.80m 166.24m 138.53m 118.74m 103.90m 92.35m 83.12m 75.56m 69.27m
25mm 984.36m 492.18m 328.12m 246.09m 196.87m 164.06m 140.62m 123.05m 109.37m 98.44m 89.49m 82.03m
V22 Double-Turn Hearing Loop (Imperial)
Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A
Impedance 22.6Ω11.3Ω7.53Ω5.65Ω4.52Ω3.77Ω3.23Ω2.83Ω2.51Ω2.26Ω2.05Ω1.88Ω
Cable Type Cable Length
Max.
Cable
Length
Round
Cable
(AWG)
18AWG 1864.96ft 932.48ft 621.65ft 466.24ft 372.99ft 310.83ft 266.42ft 233.12ft 207.22ft 186.50ft 169.54ft 155.41ft
14AWG 2131.29ft 1065.65ft 710.43ft 532.82ft 426.26ft 355.22ft 304.47ft 266.41ft 236.81ft 213.13ft 193.75ft 177.61ft
Flat
Cable
(Width)
18AWG
(equiv.)
2254.91ft 1127.45ft 751.64ft 563.73ft 450.98ft 375.82ft 322.13ft 281.86ft 250.55ft 225.49ft 204.99ft 187.91ft
14AWG
(equiv.)
2958.49ft 1479.24ft 986.16ft 739.62ft 591.70ft 493.08ft 422.64ft 369.81ft 328.72ft 295.85ft 268.95ft 246.54ft

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Driver Area Coverage
Note:A full site survey of an installation area is recommended for
optimal loop design.
Areas detailed in the table below are valid only when the following
conditions are met:
1. Area is at the maximum current the driver is capable of delivering
without voltage clipping at 1.6KHz
2. Loop layout is designed to achieve 0dB in the centre
3. 25mm x 0.1mm at copper cable
4. Loop is installed in the oor
5. Listening height 1.2m (large perimeter loops may have areas where
the actual signal level is higher than required)
Area
Voltage Current 1:1 1:2 1:3
22V 12A 715.0sqm 899.0sqm 961.0sqm
7692.0sqft 9672.0sqft 10338.0sqft

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Front Panel Overview
Controls
1. Clip Status Light - When lit, this status LED indicates the signal on
the hearing loop output is clipping (see Troubleshooting on page
25 for appropriate solutions).
2. Open Circuit Loop - Indicates the status of the Loop integrity
3. Display Screen - Indicates the status of the Loop Output, displays
menu and adjustment options.
4. Control Dial - Used for unlocking and making adjustments.
1
2 3
When power is applied the hearing loop driver will automatically
perform an analysis of the loop connected to the output.
When the analysis is complete, the following screen should display:
Start-Up Sequence
Rotating or pressing the control will display the unlock screen.
Should an error occur during start up, please consult warning and
error messages page 26.
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